Abstracts

XX International Linac Conference

THB09 (Poster)

Beam Energy Stabilization of the KEK 40MeV Proton
Linac

Z.Igarashi, K.Nanmo, T.Takenaka, E.Takasaki (KEK)

Various improvements to increase the beam intensity of the KEK-PS for
neutrino oscillation experiment have been continued these several years. The limit of
the beam intensity is mainly depended on the beam loss in the accelerator or the beam
transport line, now. To restrict the beam loss, various beam parameters should be
stabilized to keep the same values during long accelerator operation period. To
stabilize the beam energy of the 40MeV Proton Linac, the signal from the beam
velocity monitor is fed to the phase shifter of the debuncher at the 40MeV beam
transport line, then the phase of the field in the debuncher is modulated so as to be
in acceleration phase for lower energy beam and to be in deceleration phase for
higher energy beam. The beam stabilization system for the KEK 40MeV Proton Linac will
be presented in this conference.